Abstract: Abstract: A chitosan imine functional modification of cotton fiber oxidized by sodium periodate was performed in this paper. The effects of different concentrations of sodium periodate on the aldehyde content, breaking strength and weight gain of cotton fiber after chitosan treatment were investigated. The results indicated that the chitosan molecule crosslinked with oxidized cotton fiber through the C＝N of Schiff base, and the crystallinity of oxidized cotton fiber after chitosan treatment slightly decreased by the Fourier Transform Infrared Spectra and the peaks separation and curves imitation of X-ray diffractograms. The breaking strength and elongation of chitosan modified cotton fiber decreased, whereas the initial modulus increased. Furthermore, a model experiment for the load and controlled release of aloe anthraquinone extract was studied using the chitosan modified cotton fiber as a drug carrier, and obtained a good result such that this novel modified cotton fiber suggested the wide applications for the sustained release drugs.

Key words: chitosan, oxidized cotton fiber, anthraquinone extract of aloe, controlled release, peak separation and curve imitation